Vince Fulco (el 2007-11-05 a les 13:33:09 -0500) va dir:: > A bit off track from the core app but I wondered if anyone might have > a suggestion for the best way to store (and access) a set of > conditions to be used against an automated table query process. >[...] > Condition #1, temperature > 10 degrees & temperature < 20 degrees > Condition #2, temperature > 20 degrees & temperature < 30 degrees & Tuesday > > The individual conditions might have a number of criteria from 1 to 6 > typically. > > I would like to run each line as a separate query against my data and > then calculate summary statistics. Any trailheads would be much > appreciated.
Any container which may store strings of text would be sufficient.
Since you'll probably spend more time running a query than getting its
definition, the simplest solutions wouldn't hurt overall performance
(but of course, you should run some timings).
For instance, with a text file::
for query in open('query_file'):
do something with table.where(query) or table.readWhere(query)
As simple as that. BTW, please note that the '&' operator takes a
different precedence than 'and', so you'd better use::
(temperature > 10) & (temperature < 30)
Hope that helps,
::
Ivan Vilata i Balaguer >qo< http://www.carabos.com/
Cárabos Coop. V. V V Enjoy Data
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